Blower.



J. H. AXIEN.

BLOWER.

APPLICATION FILED NOV. 26, 1912.

8 SHEETS-SHEET 1.

INVENTOR JOHANN Hueo AXIEN EY ATTORNEY COLUMBIA FLANOGRAPHCO.,WASHINUTON. D. c.

J. H. AXIEN.

BLOWER.

APPLICATION rum) NOV. 25, 1912.

1,092,1 32. Patented Apr. 7, 1914 v 8 BHEETESHEET 2.

j tr 5 W11 10 WITNEssES INVENTOR I YJOHANN Hueo Axum W BMWSWWQ TTORNEYCOLUMHAA PLANOGRAPH COwWASHlNGTON, D. c-.

J. H. AXIEN.

BLOWER.

APPLICATION FILED NOV. 25, 1912.

Patented Apr. 7, 191% 8 SHEETS-SHEET 3.

w I v INVENTOR WC doHANNHuso AXIEN ATTORNEY.

. COLUMBIA PLANDGRAPH co.. WASHINGTON. D. c.

UNFTE JOHANN HUGO AXIEN, OF HAMBURG, GERMANY.

BLOWER.

Specification of Letters Patent.

Patented Apr. 7,1914.

Application filed November 25, 1912. Serial No. 733,469.

To all whom it may concern Be it known that I, JOHANN HUeo AXmN, subjectof the German Emperor, residing at Nos. 29/31 Flachsland, in the city ofHamburg, German Empire, have invented new and useful Improvements inBlowers; and I do hereby declare the following to be a full, clear, andexact description of the same.

My invention relates to a blower (for example of the Root type) in whichthe air or other medium, such as a gas or liquid, sucked in is forced bymeans of a blade, which is so moved in close contact with the innersurface of the blower casing that it always separates the suction andpressure chambers. In the blowers of this kind heretofore used theoperation was accompanied by a very unpleasant mechanical noise.According to my invention this noise is avoided by the force blade beingguided at all parts, for which purpose I connect both ends of the bladewith suitable organs. I prefer to connect one end of the force blade toa crank pin which moves on a path concentric to the bore of the blowercasing, while the other end of the force blade is hinged to anoscillating arm the axis of which is inside the blower casing. It isthen possible to avoid working surfaces inside the casing which requirelubrication and accordingly give occasion to the very considerabledefect that the lubricant is taken away by the forced air.

On the drawing an embodiment of the invention is shown by way ofeXample.

In all figures similar parts are designated by the same referencecharacters.

Figure 1 is a side elevation of one construction of the blower; Fig. 2is a section of an eXplanatory device; Fig. 3 is a corresponding sectionshowing the blade in another position; Fig. 4 is a vertical section onthe line CD in Fig. 2; Fig. 5 is a section on the line A-B of Fig. 1.

The invention as claimed is illustrated by Figs. 1 and 5. The featuresof the invention will first be explained relative to Figs. 1 to 4 whichare for purposes of ex planation only.

The casing of the blower, in the construction shown in Figs. 1-4,consists of a mid dle part 1 having a cylindrical bore 2, a foundationplate 3 and two covers 4 and 5. In the cover 5 is j ournaled the shaft 6which carries a driving pulley 7 and is journaled at its other end inthe bearing 8. On the inner end of the shaft 6 is fastened a disk 9,which carries the crank pin 10. On this crank pin turns the bored end 11of the blade 12, so that said blade can be turned about the pin 10.Through the opposite end 13 of said blade, which is also bored, passes abolt 14: which projects into the eyes 15 of the oscillating arm 16.Between the blade 12 and the blade 16 there is therefore a hlngeconnection. The other end 17 of the arm 16 turns about the bolt 18.

If the disk 9 is rotated by the shaft 6 the crank pin 10 and the end 11of the blade will be correspondingly moved. As the opposite end of theblade is hinged to the 0s cillating blade 16 it cannot describe a 1'0tary movement, but will receive a peculiar swinging motion which isutilized to cause the air entering through the socket 19 to be pressedout through the socket. 20. In Fig. 2 the blade 12 in the position 1 hasjust cut off communication between the cylinder 2 and the inlet socket19. On further rotating the air inclosed is moved. As in the meantimethe lower end 21 of the oscillating blade 16 is lifted from the curvedshape guide 22 the air displaced by the blade 12 can pass through theopening 23 to the outlet socket 20. In the position TIT shown in Fig. 3the blade has displaced all the air which entered into the cylinderduring the previous rotation and in the meantime the cylinder 2 isfilled with fresh air entering through the socket 19. During the furthermovement of the blade 12 the air must be prevented from passing from thepressure side to the suction side of the blower. This is done by theoscillating blade 16. which, during the further movement of the blade,swings toward the outlet socket, its lower end 21 coming into contactwith the corre spondingly shaped casing at 22. In the position IV shownin Fig. 3 the oscillating arm 16 has been moved as far as possibletoward the outlet socket 20 and begins to return. The end 21 of this armremains in close contact with the surface 22 of the casing until theparts arrive in the position I shown in Fig. 2, in which position theend 11 of the plate is in contact with the inner surface of the cylinder1, so that there is then no communication between the pressure side ofthe casing and the inlet socket 19. The described operation is thenrepeated.

As no valves of any kind are used in the new blower it can be driven ata very high speed, and for this'purpose, for example, the driving shaft6 may be coupled directly to an electromotor.

While the blade 12 is moving from the position III in Fig. 3 into theposition IV the oscillating blade 16, as above mentioned, will preventthe forced air from passing to the suction side of the blower. Duringthis interval the oscillating blade in close contact with the surface 22will first be moved toward the outlet socket 20 from the same. Becauseduring the movement of the oscillating blade 16 away from the outletsocket the pressure chamber is enlarged, the forced air may returnsomewhat during this interval. In order to avoid this I prefer torigidly connect the blade 16 with a blade 24 provided on the same axis18. Such a construction is shown in Fig. 5, the oscillating blade 16 andblade 24 being here made in one piece. The end 21 of the arm 16 is asfar removed from the axis as the end 25 of the blade 24, which latter isin close contact with the curved shape surface 26. In the position shownat V the blade 16 is nearest to the outlet socket 20. During the furthermovement of the blade 24 the blade 16, in close contact with the casingat 22, will be moved away from the outlet socket, and at the same timethe blade 24 will be moved through the same angle toward the outletsocket 20, the end 25 being then in close contact with the surface 26.As a consequence the size of the pressure chamber remains unaltered andno oscillation of the forced air column can occur.

\Vhen the parts have arrived in the dot and dash position shown at VIthe end 21 of the blade 16 will begin to rise from the surface 22 andfresh air will be forced by the blade 12 to the outlet socket 20. In thevmeantime air can pass into the interior 2 of the blower until the blade12 has cut off communication with the inlet socket. hen this has takenplace, while theblade 16 still cuts off communication with the outletsocket, the air in the chamber 2 will be compressed during the furthermovement of the blade 12. In the example shown in Fig. 5 the innersurface of the chamber 2 is prolonged downward by a kind of tongue 27.The farther this tongue reaches, the sooner and then away willcommunication between the chamber 2 and the inlet socket 19 be cut offby the blade 12, and the longer it takes from this point before theblade 16 opens communication with the outlet socket 20, the greater willbe the compression of the air sucked into the casing. The length of thetongue 27 is however limited by the fact that it must not hinder theoscillating movement of' the blade 12. The blade may however be soshaped that the tongue 27 reaches behind the end 11 of the blade asshown in Fig. 5.

What I claim and desire to secure by Letters Patent of the United Statesis 1. The described blower comprising in combination, a casing, a forceblade inside said casing, a crank pin adapted to rotate in said casingand carrying one end of said force blade, an oscillating blade hinged tothe other end of said force blade, and a blade rigidly connected to saidoscillating blade, substantially as and for the purpose set forth.

2. The described blower comprising in combination, a casing, a forceblade inside said casing, a crank pin adapted to rotate in said casingand carrying one end of said force blade, an oscillating blade hinged tothe other end of said forceblade, and a blade of the same radial lengthas and rigidly connected to said oscillating blade substantially as, andfor the purpose, set forth.

3. The described blower comprising in combination, a casing, a forceblade inside said casing, a crank pin adapted to rotate in said casingand carrying one end of said force blade, an oscillating blade hinged tothe other end of said force blade, a blade rigidly connected to saidoscillating blade, and a tongue extending from the upper part of thecasing to a point substantially between the pivoted ends of the forceblade when in upper position, substantially as and for the purpose setforth.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing witnesses.

J OHANN HUGO AXIEN.

lVitnesses:

ERNEST H. L. MUMMENHorF, IDA CHRIST. I'IAFERMANN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner 0! Patents.

